Ultrasound Assisted Extraction (UAE) of total polyphenolics (TPPs) and antioxidant capacity of fractions of alcoholic extracts of sugar cane leaves
aKaman Singh, bD. Kumar , aAjay Kumar and bRayees Ahmad Bhatt
a Ultrasonic Laboratory, Department of Chemistry, Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow –226 025, India
E-mail: singh.kaman@bbau.ac.in
Mob: +91-9414505189
bDepartment of Chemistry, Government Model Science College, Jiwaji University, Gwalior-474 009, (M.P.) India
E-mail: drdkumar65@gmail.com
Abstract.
The phenolic acids are aromatic secondary plant metabolites broadly distributed throughout the plant kingdom. The phenolic compounds confer unique taste, flavor, and health-promoting properties found in vegetables and fruits. The term “phenolic acids”, in general, designates phenols that possess one carboxylic acid functionality, moreover, the reason for including phenolic acids in the family of plant polyphenols lies in the fact that they are bio precursors of polyphenols and, more importantly, they are metabolites of polyphenols. Naturally occurring phenolic acids contain two distinctive carbon frameworks: the hydroxycinnamic and hydroxybenzoic structures. Hydroxycinnamic acid compounds are produced as simple esters with glucose or hydroxy carboxylic acids. Plant phenolic compounds are different in molecular structure and are characterized by hydroxylated aromatic rings. Quercetin (7-pentahydroxyflavone) is one of the most common flavonols present in nature that has attracted the attention of many researchers because of its biological and pharmaceutical properties. The use of ultrasound in food processing industry is gaining acceptance. The power ultrasound has been in practice on industilized crystallization of sugar during its manufacturing and this technique has been in use since last two decades in sugar processing in India and China. The sugar cane plant which is commonly used as KALPVIKSH is a rich source of polyphenols/phenolic acids and a total of 21 total polyphenols(TPPs) have been identified in sugar cane plants. However, till date, in the extraction/identification of the TPPs has not been employed by ultra sonic treatment . In the present paper, therefore, an attemt has been made by us to employ the UAE of polyphenolics and antioxidant capacity of fractions of alcoholic extracts of sugar cane leaves.
The aim of the present study is to determine the analytical potential of the UAE of polyphenolics and their antioxidant capacity of fractions of alcoholic extracts of sugar cane leaves.The UAE of the sugar cane leaves is accompanied by incresed yield of extracted TPPs, increased rate of extraction, particularly in the extraction cycle enabling significant reduction in extraction time and higher processing thoughtput.
Key Words: Ultrasound, extraction, polyphenolic antioxidants, sugarcane leaves
Ref: K. Singh, S.P. Gupta, A. Kumar, A. Kumar, Ultrasonics Sonochemistry https://doi.org/10.1016/j.ultsonch.2018.05.030.
K. Singh, S.P. Gupta, A. Kumar, A. Kumar, Proc. Sugar Technol. Assocn India, 2018, 76, 415
V.K. Singh, S.K. Verma, B. Chandra, S.P. Gupta, K. Singh, S.P. Gupta, J. Pure Appl. Ultrason. 2013, 35, 137